Temperature-compensator for vibrating regulators.



W. L. BLISS.

TEMPERATURE COMPENSATOR FOR VIBRATING REGULATORS.

APPLICATION FILED SEPT.6. 1912.

6 1mmTRRRRT g 9 2 Mo 50 J UNITED STATES PATENT OFFICE.

WILLIAM L. BLISS, OF NIAGARA FALLS, NEW YORK, ASSIGNOR, BY MESNE.ASSIGN- MENTS, TO U. S. LIGHT & HEAT CORPORATION, OF NIAGARA FALLS, NEWYORK, A

CORPORATION OF NEW YORK.

TEMPERATURE-COMPENSATOR FOR VIBRATING REGULATORS.

Specification of Letters Patent.

Patented Sept. 5, 1916.

Application filed September 6, 1912. Serial No. 718,896.

To all whom it may concern Be it known that I, WILLIAM L. Buss, acitizen of the United States, residing at Niagara Falls, in the countyof Niagara and State of New York, have invented new and usefulImprovements in Temperature- Compensators for Vibratin Regulators, ofwhich the following is a fu 1, clear, concise, and exact description,reference being had to the accompanying drawing, forming a part of thisspecification.

This invention relates to temperature compensators for vibratingregulators.

An object of the invention is to provide a vibrating regulator whichshall be sensitive and constant in operation.

A further object is to provide a regulating system including vibratingregulators with. means for compensating for the rise in resistance ofthe operating coils in the vibrating regulators due to temperature risetherein.

An embodiment of my invention is illustrated in the accompanyingdrawings which show diagrammatically a regulating system to whichtemperature compensating means has been applied.

The regulating system herein illustrated shows a generator 1 providedwith a shunt field 2. The regulating elements here illustrated include acompressible rheostat 3 in series with the field and a vibratingregulator t controlling the operation of the operating means for thecompressible rheostat. The compressible rheostat is controlled by a bellcrank lever 5 provided with a plunger 6 of magnetic material, acted onby the coil 7 connected across the system as by conductors 8, 9, 10, 11.A suitable resistance 12 may be interposed in series with the operatingcoil. A dash pot l3 regulates the action of the bell crank lever.

The vibrating regulator comprises a flexible or elastic vibrating memberrigidly attached at one end, composed of laminm of dissimilar materials,such as the upper lamina 14 of brass and the lower lamina 15 of iron orsteel. The vibrating member carries a contact 15 adapted to cooperatewith a contact 16 carried by an adjusting screw 17. The contacts arenormally pressed together by the spring action in the vibrating member,and the amount of this pressure may be regulated by proper adjustment ofthe contact 16. A differential voltage coil 21 is connected acrossconductors 9 and 10 by conductors 22, 23, 24, and when energized,opposes coil 18. A suitable resistance 25 ma be arranged in series withthe coil 21. T e vibrating member controls a circuit through contacts15, 16, which, when the contacts are closed, short circuits ,therheostat operating coil 7 and the differential coil 21. A suitable boXor casing 28 incloses the vibrating member and its controlling coils.Oonductors 29, 30, supply any desired translating devices.

The system illustrated may operate as follows: Upon rise in voltage ofthe system, the coil 18 vibrates the'member 14, 15 in the manner ofregulators of this type, this vibration being accelerated by thedifferential coil 21 which is energized to oppose coil 18 uponseparation of the contacts 15, 16. These contacts control the energizingcoil 7, the mean energization of which determines the pressure exertedon the electrodes of the compressible rheostat 3, and consequently theresistance of the shunt field circuit. Upon rise in temperature, due toheating of the coil 18, the resistance thereof will increase andtherefore the vibrating member would respond to increasing voltagesonly. To avoid this difliculty and to provide for constant regulation,the laminated structure of the vibrating member may be employed. Theheat generated in the coil 18 affects the vibrating member, the laminaethereof expanding at unequal rates, the brass more rapidly than thesteel, thereby tending to move the vibrating member in a direction toseparate the contacts. This action decreases the spring pressure betweenthe contacts which the operating coil has to overcome in proportion tothe weakened effect of the coil.

It is to be understood that other materials than the ones specified maybe employed in the construction of the vibrating regulator and that thesame may be used in other forms than that disclosed. The illustration ismerely indicative of one method of practising the invention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is 1. A vibrating regulator having an operating coil, and avibratin member controlled thereby provided with means for compensatingfor temperature rise in said 001 2. A vibrating regulator having anoperating c011 and a spring armature controlled thereby, provided withmeans for varying the spring action thereof to compensate fortemperature rise in said coil.

3. A vibrating regulator having an operating coil, an elastic armaturecontrolled thereby normally held away from said coil by the elasticitythereof, said regulator having means for varying the elasticity of saidarmature to compensate for temperature rise in said coil.

4. A vibrating regulator having an operating coil and a spring heldvibrating armature controlled thereby, said armature composed of laminaeof materials having diderent coefficients of expansion wherebytemperature rise in said coil may affect said armature to flex the same,thereby modifying the spring action thereof.

5. A vibrating regulator having an operating coil, a second opposingcoil and a flexible armature under control of said coils, said armaturecomposed of laminae of materials having diii'erent coefiicients ofexpansion whereby temperature rise in said coils may cause distortion ofsaid armature to vary the flexibility thereof, thereby compensating forthe increased resistance of said coils due to temperature rise.

6. A regulator having an operating coil, a resilient vibrating armaturecomposed of mamas laminae of dissimilar materials, and an inclosingcasing therefor.

. A vibrating regulator having an operatmg coil and a vibrating armaturecon trolled thereby composed of lamina, one of which is of brass andanother of steel.

8. An armature for vibrating regulators having resilient laminae ofdissimilar materials.

9. An electric regulator having a resilient vibratory armaturecontrolled by an electromagnetic winding and means for increasing theaccuracy of said regulator, said means including temperature affectedmeans for varying the resiliency of said armature to compensate fortemperature rise in said electromagnetic winding.

10. An electric regulator having a resilient vibratory armaturecontrolled by an electromagnetic winding and means for increasing theaccuracy of said regulator, said means including temperature aii'ectedmeans for varying the resiliency of said armature to compensate fortemperature rise in said electromagnetic winding, and means forconfining the heat generated in said winding so that it may affect saidtemperature affected means.

in witness whereof, I have hereunto subscribed my name in the presenceof two witnesses.

WILLIAM L. BLISS.

Witnesses:

E. J. HANNIG, C. H. WILMER.

